What Meridian did
Eighteen days after submission, Mrs. Chen’s claim adjudicated. An 835 arrived through the clearinghouse and an EFT for $214.60 landed in the PC operating account two days later. Meridian’s biller auto-posted it, reviewed the exception queue, and reconciled the deposit to the remittance. That was the moment Meridian became a revenue-generating business.What came back
Meridian billed two lines. Here is what the 835 said, translated out of X12:
**Payer paid: 214.60. That difference is real, and we come back to it below.
The four numbers that matter
Billed charge. What you asked for. Largely fictional: it is your chargemaster rate, and no contracted payer pays it. It matters mainly because you generally cannot be paid more than you billed. Allowed amount. What your contract says the service is worth. This is the real number. It is set by your fee schedule, typically as a percentage of the Medicare Physician Fee Schedule. See Underpayments, fee schedules, and payer contracts. Contractual adjustment. Billed minus allowed. You write this off. You may not bill the patient for it — that is balance billing, and your participation agreement prohibits it. It arrives as group code CO (contractual obligation), usually with CARC 45: “Charge exceeds fee arrangement.” Patient responsibility. Deductible, copay, or coinsurance. Arrives as group code PR, and you do bill the patient for it. Miscoding a PR amount as a write-off is how practices quietly lose 10–20% of collectible revenue.The adjustment grammar
Every dollar of difference between billed and paid is explained by a triple: Group code + CARC (+ optional RARC) = a complete explanation.
CARC (Claim Adjustment Reason Code) says why: CARC 45 for fee-schedule reduction, CARC 1 for deductible, CARC 2 for coinsurance, CARC 197 for missing precertification. RARC (Remittance Advice Remark Code) adds detail where the CARC alone is ambiguous.
The full working set is in CARC codes, RARC codes, and Group codes.
Getting the group code wrong corrupts your patient ledger. Posting a PR amount as CO means you never bill a patient who owes you money. Posting a CO amount as PR means you bill a patient for something your contract says they don’t owe, which is a balance-billing problem, not just an error.
Why the deposit didn’t match the remittance
Meridian’s 835 totalled 214.60. The $1.22 difference was in the PLB segment, provider-level adjustments, which sit outside the claim detail. PLB carries things that are not about any single claim: takebacks of prior overpayments, interest the payer owes you for late payment, withholds, and capitation-related amounts. In Meridian’s case it was a $1.22 recoupment against an earlier duplicate submission. This is the concept that breaks naive reconciliation: One 835 does not equal one bank deposit. A single deposit can cover multiple remittances; a single remittance can be split. The TRN segment carries a reassociation trace number that links the 835 to the payment — that is how you match them. Reconcile using TRN, not by hunting for matching dollar amounts. See The 835: how payers answer and 835 file anatomy.Posting it
1
Auto-post
Your EHR matches the 835 to open claims and posts payments, adjustments, and patient responsibility automatically. A well-configured system auto-posts most lines.
2
Work the exception queue
Everything that didn’t match: unmatched claim numbers, takebacks, interest, secondary-payer transfers, and anything with an unfamiliar CARC. These need a human.
3
Balance the remittance to the deposit
Sum of claim payments, plus or minus PLB, equals the EFT. If it doesn’t, stop and find out why before posting. See Reconcile payments daily.
4
Route the patient balance
Coinsurance and deductible amounts move to the patient ledger and into the statement cycle. See Run patient statements and balances.
5
Queue anything denied
Any line with a $0 payment and a denial CARC goes to the denial queue, not to a write-off. See Work the denial queue.
Where the money landed
The EFT arrived in the PC operating account, which is exactly right. From there, in the monthly cycle:- The PC pays clinical payroll and its direct expenses.
- The MSO invoices the PC for the management fee.
- The PC pays the invoice.
- The MSO pays everything else.
You are now a revenue-generating MSO-PC
That is the tutorial. You have two entities, an agreement stack, a credentialed clinician, a payer contract, a billing stack, an accepted claim, an adjudicated remittance, and money in the right bank account. What you do not yet have is an operating rhythm, the daily and weekly habits that keep clean claim rates high and days in AR low, and the monthly close that keeps two entities’ books honest.Checklist
- 835 received for your first claim
- Allowed, adjustment, and patient responsibility understood line by line
- EFT confirmed in the PC operating account
- Remittance balanced to the deposit, including PLB
- Payment posted; exception queue worked
- Patient balance moved into the statement cycle
- Any denials routed to the denial queue
Next
Your First 90 Days
From one paid claim to an operation that runs itself.